The AGC in the Lunar Module ran its Apollo PGNCS ( Primary Guidance, Navigation and Control System ), pronounced as an acronym as pings.

Despite the word " primary " in its name, PGNCS data was not the main source of navigation information.

It was used by the Apollo PGNCS as a reference to which the gimbal-mounted platform at its core should be oriented to.

* Apollo guidance computer – PGNCS trouble, another case where a spacecraft guidance computer suffered from having a subsystem inappropriately left running

The Apollo Primary Guidance, Navigation and Control System ( PGNCS ) ( pronounced pings ) was a self-contained inertial guidance system that allowed Apollo spacecraft to carry out their missions when communications with Earth were interrupted, either as expected, when the spacecraft were behind the Moon, or in case of a communications failure.

The Apollo Command Module ( CM ) and Lunar Module ( LM ), were each equipped with a version of PGNCS.

There were two versions of PGNCS — Block I and Block II — corresponding to the two generations of the CM.

Components from PGNCS were used by Draper for the U. S. Navy's Deep Submergence Rescue Vehicle ( DSRV ).

The position and velocity estimates that resulted were more accurate than those produced by PGNCS.

PGNCS also provided a check on ground data.

The Prime Contractor for PGNCS and manufacturer of the Inertial Measurement Unit, IMU was the Delco Division of General Motors.

Major differences between Block I and Block II PGNCS included replacing electromechanical resolvers with an all electronic design and replacing the Block I Navbase, which was machined from beryllium, with a frame built out of aluminum tubing filled with polyurethane foam.

* the Abort Guidance System ( AGS ) of the Lunar Module, to be used in the event of failure of the LM PGNCS.

PGNCS was still essential to maintain spacecraft orientation, to control rockets during maneuvering burns, including lunar landing and take off, and as the prime source of navigation data during planned and unexpected communications outages.

PGNCS was developed by the MIT Instrumentation Laboratory.

Note PGNCS components at top-left.

This was to be used in the event of failure of PGNCS.

He also demanded that Kennedy take additional measures to increase international tension: specifically to crush the Cuban revolution, resume nuclear testing, resist more vigorously admission of China to its lawful seat in the United Nations, and postpone non-military programs at home ''.

In fact, during the first century B.C., an extensive literature sprang up devoted to these subjects, finding its typical expression in the so-called `` wei books '', a number of which were specifically devoted to the Lo Shu and related numerical diagrams, especially in connection with divination.

He does not mean, in fact he addresses himself specifically to reject the proposition, that `` if we took the risk of surrendering, a new generation in Britain would soon begin to amass its strength in secret in order to reverse the consequences of that surrender ''.

The word archipelago was originally applied specifically to the Aegean Sea and its islands.

The Anglican Communion is an international association of national and regional Anglican churches ( and a few other episcopal churches ) in full communion with the Church of England ( which is regarded as the mother church of the worldwide communion ) and specifically with its principal primate, the Archbishop of Canterbury.

While accompanying Mallowan on countless archaeological trips ( spending up to 3 – 4 months at a time in Syria and Iraq at excavation sites at Ur, Ninevah, Tell Arpachiyah, Chagar Bazar, Tell Brak, and Nimrud ), Christie not only wrote novels and short stories, but also contributed work to the archaeological sites, more specifically to the archaeological restoration and labeling of ancient exhibits which includes tasks such as cleaning and conserving delicate ivory pieces, reconstructing pottery, developing photos from early excavations which later led to taking photographs of the site and its findings, and taking field notes.

In some expressions it retains this pan-American sense, but its usage has evolved over time and, for various historical reasons, the word came to denote people or things specifically from the United States of America.

For referring specifically to a U. S. national and things, the words used are estadunidense ( also spelled estado-unidense ) ( United States person ), from Estados Unidos da América, and ianque ( Yankee ), but the term most often used is norte-americano, even though it could, as with its Spanish equivalent, in theory apply to Canadians, Mexicans, etc., as well.

So named due to its resemblance to a traditional agricultural plough ( or more specifically two ploughshares ), many manufacturers produce a plough-style design, all based on or direct copies of the original CQR ( Secure ), a 1933 design patented in the UK ( US patent in 1934 ) by mathematician Geoffrey Ingram Taylor.

Another of his theological textbooks that strove to be more minute in its focus, is his De Fide Catholica, dated somewhere between 1185 to 1200, Alan sets out to refute heretical views, specifically that of the Waldensians and Cathars.

The theory of the rasas develops significantly with the Kashmiri aesthetician Ãndandavardhana's classic on poetics, the Dhvanyāloka which introduces the ninth rasa, shānta-rasa as a specifically religious feeling of peace ( śānta ) which arises from its bhāva, weariness of the pleasures of the world.

The lyrics for the " Alabama Song " and another song, the " Benares Song " are in English ( albeit specifically idiosyncratic English ) and are performed in that language even when the opera is performed in its original ( German ) language.

While the 7800 can actually play hundreds of titles due to its compatibility with the Atari 2600, there was limited third party support for the 7800 and fewer than 100 titles were specifically designed for it.

( Aside from its historic role as a total-computable-but-not-primitive-recursive function, Ackermann's original function is seen to extend the basic arithmetic operations beyond exponentiation, although not as seamlessly as do variants of Ackermann's function that are specifically designed for that purpose — such as Goodstein's hyperoperation sequence.

The government elected in 2001 pledged to maintain the fundamental economic policy objectives adopted by its predecessor in 1997, specifically: retaining the Currency Board, implementing sound financial policies, accelerating privatisation, and pursuing structural reforms.

With BME specifically, the ranking of a university's hospital and medical school can also be a significant factor in the perceived prestige of its BME department / program.

The mechanics of the role-playing game system were created specifically for Bunnies & Burrows, common at the time of its original publishing.

Such an effect is specifically searched for with tailor-made superplasticizers developed to increase the workability of concrete and to reduce its water content.

In modern times, collectivism is sometimes thought to be synonymous with socialism or specifically Leninism for its emphasis on a hierarchical Vanguard party organization, though collectivism more accurately simply means " group oriented " or " group orientation ".

The simplest type of ab initio electronic structure calculation is the Hartree – Fock ( HF ) scheme, an extension of molecular orbital theory, in which the correlated electron – electron repulsion is not specifically taken into account ; only its average effect is included in the calculation.

Cheddar, its surrounding villages and specifically the gorge has been subject to flooding.

The condition number of ƒ at a point x ( specifically, its relative condition number ) is then defined to be the maximum ratio of the fractional change in ƒ ( x ) to any fractional change in x, in the limit where the change δx in x becomes infinitesimally small:

The differential entropy of a distribution can be defined in terms of its quantile density, specifically

In coordination chemistry, a structure is first described by its coordination number, the number of ligands attached to the metal ( more specifically, the number of donor atoms ).

The film was marketed specifically to broaden disco's popularity beyond its primarily black and Latin audiences.